Posing as an Examiner from Earth, the Doctor warns the scientist, Lesterson about the dire consequences of reactivating the dormant Daleks.
With Bragen in charge, the Daleks trick the rebels into freeing them; only the Doctor stands in the way of the Daleks wiping out the colony.
Bragen leads the rebellion and takes control of the colony, killing Governor Hensell, but the Daleks are also ready to make their final move.
Polly is taken prisoner by the rebels who intend to use the Daleks to take control of the colony; the Doctor discovers that all three Daleks have been reactivated.